Snowplow



Nov. 3, 1925. 1,560,141

R. E. cHoATE K l SNOWPLOW.

Filed Dec. 24. 1923 3 Sheets-Sheet 1 Jde/far R. E. CHOATE .SNOWPLOW Filed Dec. 24, 1923 Nov. 3, 1925.

' 3 Sheets-Sheet 2 Nov. 3 1925. 1,560,141

R. E. cHoATE sNowPLow Filed Dec. 24, 1923 s sheets-stuwt s Patented Nov. 3, 1 925.

UNITED- STATES nor n cnoa'ra, oir ennui. mms, Iowa.

SNOW PLOW.

`Application led December 24, 1928. i Serial No. 682,578..

To aZZ 'whom it fmay concern:

-Be it known thatI, Ror E. CHOATE, a

citizen of the United States, residing at Cedar Rapids, in the county of Linn and- State of Iowa, have invented certain'new and useful Improvements in Snowplows, of

" which the following is a specification.'

the

Figi y ing t y e plow in position This invention relates to heavy duty snow plows, s uchy as are used for clearing snow rom streets and driveways, and the object of the 'invention is to produce a snow plow for the purpose,which is adapted for severe service, is -adjustable as to height and width of plowing, and may be easily collapsed laterall at either or both sides, to allow for ow of traiic. Other objects will a pear lin connection with the description fo owing, in which the invention is fully set forth, reference being had to the accompanying drawing, in which :-v l is a front view in Perspective, show-` or wide plowing. Fig. 2 shows details of. one of the side abutments for the. low-supporting frame.

Fig. 3 shows detai s of the pivotal mlounting of the central and side plows.

Fig. ,4 is a rearI view perspective, show! ing one .of the side plows extended and the Jother folded close to the tracto y,

Fi 5 shows details of the draft connectionv tweenvthe main frame ofthe plow and the tractor.. l

' Fig. 6 is a front view in perspective, with the plows removed, and shows the general 'construction of the apparatus,

Fig. 7 is aplan view of the central, wedge plow and its carrying frame,

. As herein `illustrated the snow plow is shown as attached toI a owerful tractor of y, the Creeper or caterpil ar type; The nature of the invention is such, however, that with sli ht modification in structure it may be readily attached to other. tractors of either this or the ordinary drive-wheel type. As a preliminary it may be stated'that the tractor mentioned is provided with apparatus for operating a hydraulic lifting jack,

which ty ofhoisting apparatus is well adapted or the heavy service required of it. Thisis indicated in Fig. 4, the rear end of the tractor .5 being provided with a` hyf draulic pump 6 driven 'by thetractor power plant, andcontrolled -by theoperator 1n the tractor-cab 7 by means 'of suitable valve- :controlling apparatus indicated by the rod 8. It `has not been deemed necessaryto illustrate this hydraulic'mechanismI in detailas it is in general use, and with the'excep:

.9 anchored to the rear end, and a draw-bar -10 attached thereto. The attachment of 'the plow frame to this draft apparatus will be. fully set forth hereafter. .The creepers -11 of the tractor are journaled to side frames- 12 (Fig. 2,), and to these are attached abut.. ments to take the side-thrust of the adjacent plow frames, as. will be fully set forth in detail.

The main supportin frame for the plows (central wedge and iagonal side wm s) has a pair of side sills 13 terminatin irwardly in an A-frame .14. To thisrame is securely attached'at each side a pair of runners 15, whichrin the main'carry the frame and superstructure. The side and forward part of the frame-'are rigidly connected,'but the rear cross-sill 16 ,is detachable, so that when it is removed the tractor may be driven forwardly into the frame,- which is then coupled to it. Referring to- Fig. 5 it will be seen that-the rear cross-sill is composed of apair of strong beams ttin into the side sills,L and provided at eac end with an interposed abutment plate 17. vThese fit' into seats 13, and are helddetachably in place by pins- 18v passing through the abutment plates and adjacent sill is secured another plate 20, rojecting forwardly, and adapted to couple y a suitable pin or bolt 21 with the draw-barabovementioned. Two auxiliary draw-bars 22 are .also provided, connecting'v the rear cross-sill diagonally with the tractor draw-plate, and

serving not onlyto reinforce the'draft, but to brace the frame in relation tothe tractor.

There being norigid connection of the n -plow withthe tractor, the two may act independently with respect to the roadway,

1 and either may rock up and down as conditions may require. The plow is held to its true course laterally, however by abutment guides above referred to. One of these is shown invv Fig. 2it being understood thatthere is one on each` side of the tractor. The device .consists of a casting 23 securedto the beam 12, and provided with a vertical post 24 tovact as `a guide for` the main frame in 1 The diagonal wing-plows 31 are hinged at 32 to swing up and down, and the members 33 to Vwhich the plows are hinged, are themselves hinged at 34 to swing horizontally. The latter hinge forms part of a cross-head 35 mounted slidably on a guide-post 36 se-5 cured to the sub-frame, and suitably braced at 37. A cable 38 attached to the cross-head serves for lifting the same and the connected front end of the side plow by means of a winch 39 attached to the post. This winch is preferably of the worm-gear and drum type, as shown in the principal ligures of the drawing, vbut maybe a simple ratchet and lever winch, as indicated in Fig. 1. The posts carrying the crossheads vare connected overhead, and form a stable gallows o-r derrick to carry the weight of the suspended plows. A similar -derrick near the rear is composed of two vertical posts 40 and a connecting cross-beam 41, with suitable braces 42 and43, and serves for the elevation of the side-plows at the rear by means of a winch 39 attached to each post. The tackle 45, is however attached to the front derrick, for the most effective lifting, the cable being run" over sheaves 46 at the top of the rear derrick.

The preferred lifting apparatus for the heavyjfront plow and connected frame is a hydraulic jack 47 mounted on parallel beams 48 of the sub-frame. `Its ram connects at 49 with a heavy stirrup or yoke 5() secured to the tilting frame toV which the plow is attached. As this point of connection moves in an arc the jack is provided with trunnions 51 journaled in bearings 52, as shown in Fig. 6. Itpwill be noted also inv the same figure that the' tilting frame is provided with depending legs 53, which'serve as lateral abutments against the side-thrust of the adjacent sub-frame, and thus stay the .tilting frame laterally against the heavy side-strains to whichthe plow is at times subjected. l

The side-plows are held out-ward to any desired angleby struts 54, preferablyV apair for each plow. These are made to telescope,

Vpreferably by the use of tubular material,

the member 54*l of each pair being pierced at 54". to receive pins 54. As the plows are adapted to take a compound movement,

theconnection of the'struts with them and with the posts of the rear derrick is by universal joints 55 and 55, respectively. The former are connected as a crsshead by a rod 56, and the joints themselves are mounted `slidably of parallel guide-bars 57 secured at the yends to the ribs of the plows. v

This makes it possible to collapse either or both plows, and swing them in close tothe main frame, by sliding the crosshead forwardly, and permitting the struts to shorten telescopicallyu This is a matter of great convenience, as'it admits of the movement of the apparatus through comparatively narrow spaces, and swinging elther 'plow out invention, I

a hydraulic jack rockably mounted on the main frame, and connecting by-its ram with said yoke.

3. In a snow-plow, a main frame having plow-supporting side sills, a derrick rising therefrom, a side plow having a pivotal connection at its front end with said frame, a horizontally swinging member forming the connecting medium between the pivot and the frame, means carried by the derrick for hoisting the plow, and a strut connecting the plow and the frame.

4. In a snow-plow, a main frame having plow supporting side sills, a derrick rising therefrom, a crosshead slidable up and down on said derrick, a horizontally swinging hinged member carried by the crosshead, a plow hinged forwardly to said hinged member so as to swing up and down, means'carried by the derrick for lifting the plow on its pivot, independent means carried by thelderrick for elevating the l crosshead, and a strut interposed between the plow and main frame.

5. In a snow-plow, a mam framehaving 'side sills, a plow hinged to swingl horizontally with respect to said frame, and an endwise adjustable strut connecting the plow and frame, whereby the plow may be disposed at any desired angle to said frame.

6. In afsnow-plow, a main frame having side sills, a plowhinged forwardly to the frame structure, so as to swing-horizontally, and an adjustable and collapsible strut connecting the plow with the frame, whereby thel plow maybe held at any desired angle, and folded close to the frame. V-

7. In a snow-plow, a main frame having side sills, a plow hinged forwardly to the frame structure soas to swing toward and from it at the rear, a longitudinal guide carried by' said plow, and a telescopic strut hingedly connecting with they frame, and hingedly and slidably connecting at its other end with said guide.

8. In a.snow-plow, the combination with a main frame and its superstructure, of a sidev plow connecting 'forwardly with the 1.5 frame structure by a universal joint, an endwise radjustable strutconnecting the plow rearwardly with the 'frame structure, and universal joints connecting thestrut with the plow and the frame.

9. In a snow-plow, the combination 'with .signed to receive a tractor,

of a 'side-plow connecting the frame by a universal longitudinal guides carried bv theplow, a crosshead slidable thereon, a pair of endwise adjustable struts disposed between the plow and frame, and universal joints connecting said struts at one end with Ehe (frame, and theother end with the crossea 1 0. A snow plow, comprising thecombination of a. V-shaped no se, a rearwardly extending frame secured thereto and dewings' pivotally- :mounted on the fram'e -behind the nose, guideways on the frame, blocks secured to amain frame, forwardly with joint, a pair of the pivots and slidable in the guideways to raise and lower the forward ends of the winds. y o .i l l III testimony whereof I ailix my signature. ROY E. CHOATE. 

